12147219 has 16 divisors (see below), whose sum is σ = 20567040. Its totient is φ = 6941160.

The previous prime is 12147203. The next prime is 12147221. The reversal of 12147219 is 91274121.

12147219 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12147219 - 2⁴ = 12147203 is a prime.

It is a super-2 number, since 2×12147219² = 295109858867922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12147192 and 12147201.

It is not an unprimeable number, because it can be changed into a prime (12147269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31947 + ... + 32324.

It is an arithmetic number, because the mean of its divisors is an integer number (1285440).

Almost surely, 2^12147219 is an apocalyptic number.

12147219 is a deficient number, since it is larger than the sum of its proper divisors (8419821).

12147219 is an equidigital number, since it uses as much as digits as its factorization.

12147219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64287 (or 64281 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 12147219 is about 3485.2860714725. The cubic root of 12147219 is about 229.8752884082.

The spelling of 12147219 in words is "twelve million, one hundred forty-seven thousand, two hundred nineteen".